Lens and strap gage.



P. W. JACOBY.

LENS AND STRAP GAGE.

APPLICATION FILED 1AN.22. 19x6.

Patented Dec. 26, 1916.

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PETER W. JACOBY, OF YORK, PENNSYLVANIA.

LENS AND STRAP GAGE.

Specification of Letters Patent.

Patented Dec. 26, 1916.

Application filed January 22, 1916. Serial No. 73, 745.

To all whom it may concern:

Be it known that I, PETER W. JACOBY, a citizen of the United States,residing at York, in the county of York and State of Pennsylvania, haveinvented certain new and useful Improvements in Lens and Strap Gages;and I do hereby declare the following to be a full, clear, and exactdescription of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to new and useful improvements in lens and strapgages and the principal object of the invention is to provide a deviceby which lenses may be tested as to their thickness in order that thestraps for holding the same may be properly adjusted.

Another object of the invention is to provide a device which isparticularly simple in construction and which is adapted to be folded tooccupy a minimum amount of space.

Still another object of the invention is to provide a device adapted fortesting the proper set of the strap without removing the screwtherefrom.

With these and other objects in view, the invention consists in thenovel combination and arrangement of parts which will be fully set forthin the following specification and accompanying drawings, in whichFigure 1 is a view illustrating the gage in use. Fig. 2 is an endelevation of the gage showing the same in its folded position, and Fig.3 is an enlarged sectional view on line 3-3 of Fig. 1.

Referring to the drawings, the numeral 1 designates the pivot pins ofthe various leaves of the gage which are designated generally by thenumeral 2. Each of these leaves comprises a body 3 having formed nearone end an opening for the reception of the pivot pin, while theopposite end is curved as at 4. A gage slot 5 is formed in each of theleaves and is of a thickness equal to the thickness of the leaf so thatthe thick ness of the lens when slipped in the slot may be readilydetermined. A suitable guide slot 6 is formed in each of the gage leavesand these slots 6 are adapted for the accommodation of the screw in thestrap which holds the lens. The slots 5 and 6 extend inwardly from oneedge of each leaf as clearly shown in Fig. 1 so as to readilyaccommodate the lens and screw.

v strap by the lens and the As illustrated in Fig. 2 the gage leavesvary in thickness as do the openings or slots 5 and it will thus be seenthat when a lens is slipped into one of the slots its thickness will beindicated by the thickness of the leaf. In order that the strap may beadjusted to the proper thickness for the reception of the lens the sameis slipped over the end of the leaf as shown in Fig. 1 so that the screwthereof passes into the slot 6 and it will thus be seen that the lengthof thestrap may be pressed inwardly or sprung outwardly ac cording tothe thickness of the leaf. In this way it will be seen that the strapmay be properly prepared for the reception of the lens and thus thenecessity of setting the risk of breaking the lens due to such anoperation is eliminated.

WVhile in the foregoing there has been shown and described the preferredembodiment of this invention, it is to be understood that such changesmay be made in the combination and arrangement of parts as will fallwithin the spirit and scope of the appended claims.

What is claimed is 1. A lens and strap gage comprising a plurality ofleaves of various thicknesses each leaf being provided with slots in oneedge of a width equal to its thickness.

2. A lens and strap gage comprising a plurality of leaves of variousthicknesses, each leaf being provided in one edge with a slot of a widthequal to the thickness of the leaf and means pivotally securing theleaves at one end.

3. A lens and strap gage comprising a plurality of leaves of variousthicknesses, each leaf having a gage slot in one edge, of a width equalto the thickness of the leaf, said leaf also having a guide slotintermediate the gage slot and the end, a curved end on each leaf andmeans pivotally holding the leaves together near the end opposite thecurved end.

In testimony whereof I affix my signature in presence of two witnesses.

PETER W. JACOBY.

Witnesses:

PETER M. BECKER, CLARENoE E. KOHLER.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

